Siemens 5SU1356-7KK13 Residual Current Circuit Breaker (RCCB) 13A 30mA 1P+N C

The Siemens 5SU1356-7KK13 is a high-performance Residual Current Circuit Breaker (RCCB) designed for robust electrical protection. This 13A, 30mA, 1P+N (single-pole plus neutral) device with a Type C tripping characteristic offers superior safety and reliability in demanding industrial and commercial environments. Its compact design facilitates easy integration into distribution boards, while its advanced tripping mechanism ensures swift disconnection in the event of earth faults, significantly reducing the risk of electric shock and fire hazards. The Siemens 5SU1356-7KK13 leverages decades of Siemens' expertise in circuit protection, positioning it as a leading choice for safeguarding sensitive equipment and personnel. Key technical parameters include a rated voltage of 230/400V AC, a rated short-circuit breaking capacity of 6kA, and compliance with IEC/EN 61009-1 and IEC/EN 61009-2-1 standards.

Product Specifications

| Feature                 | Specification                                |

| :---------------------- | :------------------------------------------- |

| Product Type            | Residual Current Circuit Breaker (RCCB)      |

| Manufacturer            | Siemens                                      |

| Model Number            | 5SU1356-7KK13                                |

| Rated Current           | 13A                                          |

| Rated Residual Current  | 30mA                                         |

| Number of Poles         | 1P+N (Single Pole + Neutral)                 |

| Tripping Characteristic | Type C                                       |

| Rated Voltage (AC)      | 230/400V                                     |

| Rated Short-Circuit     | 6kA                                          |

| Breaking Capacity (Icn) |                                              |

| Frequency               | 50/60 Hz                                     |

| Terminal Type           | Screw Terminal                               |

| Mounting Type           | DIN Rail                                     |

| Protection Class        | IP20 (enclosure), IP40 (with cover)          |

| Operating Temperature   | -25°C to +45°C                               |

| Compliance Standards    | IEC/EN 61009-1, IEC/EN 61009-2-1             |

Core Features & Market Positioning

The Siemens 5SU1356-7KK13 stands out due to its precise 30mA residual current detection, offering critical protection against indirect contact, thereby safeguarding human life. Its Type C tripping curve is specifically engineered to handle moderate inrush currents from inductive loads, such as motors and transformers, without nuisance tripping, a common issue with Type B or K breakers in such applications. This makes it exceptionally versatile for varied industrial settings. Siemens' reputation for manufacturing durable and reliable electrical components further solidifies its market position; users trust the brand for long-term performance and safety assurance in critical infrastructure. The robust construction ensures operational integrity even in harsh environments, a key differentiator in the competitive industrial protection market.

Key Application Scenarios

This 13A, 30mA RCCB is ideally suited for protecting circuits in commercial buildings, residential complexes, and light industrial facilities where the risk of earth leakage is present. Common applications include the protection of socket outlets, lighting circuits, and individual appliances that draw moderate currents. Its inclusion of the neutral pole (1P+N) simplifies wiring for single-phase circuits requiring full pole isolation, crucial for applications involving sensitive electronics or where maintenance requires complete circuit de-energization. The Type C characteristic makes it particularly suitable for circuits feeding equipment with moderate inductive loads, such as small motor-driven machinery, pumps, and fans.

Practical System Integration Guidance

Integrating the Siemens 5SU1356-7KK13 into existing electrical systems is straightforward due to its standard DIN rail mounting and familiar terminal configurations. Ensure the incoming power supply (line and neutral) is connected to the upper terminals, and the outgoing protected circuit (load) is connected to the lower terminals, observing correct polarity. The neutral conductor from the incoming supply should be connected to the neutral terminal of the RCCB, and the outgoing neutral conductor to the load should also be connected to the neutral terminal. The earth conductor should *not* pass through the RCCB but be connected directly to the protective earth bar in the distribution board to maintain system grounding integrity. Prior to energizing, a thorough visual inspection and insulation resistance test of the protected circuit is recommended.

Operation and Risk Mitigation

The primary function of the Siemens 5SU1356-7KK13 is to detect and interrupt current imbalances between the live and neutral conductors, typically caused by a fault to earth. When such a fault occurs, and the leakage current exceeds the 30mA threshold, the RCCB rapidly trips, disconnecting the circuit and preventing potential electric shock or fire. The Type C characteristic allows for higher inrush currents of up to 5-10 times the rated current before tripping, protecting against nuisance tripping from motor start-ups. In the event of a fault, the test button located on the front of the device can be used to simulate a leakage current, verifying the tripping mechanism and ensuring operational readiness. Regular testing, as per local electrical regulations, is vital for maintaining safety.

Scalability & Long-Term Value

The Siemens 5SU1356-7KK13 is designed for seamless integration within Siemens' broader SIVACON and ALPHA distribution board systems, ensuring compatibility and ease of expansion. While RCCBs themselves are protective devices and not typically "scaled" in the traditional sense, their compatibility with other Siemens protective devices and busbar systems allows for robust and future-proof electrical installations. For installations requiring higher levels of monitoring or integration with digital platforms, these RCCBs can be part of a system where smart metering or remote monitoring devices are employed, providing data on energy consumption and fault occurrences, thus contributing to the overall digital transformation of facility management.

Frequently Asked Questions (FAQs)

1. What is the primary function of a Siemens 5SU1356-7KK13 RCCB?

The Siemens 5SU1356-7KK13 RCCB primarily detects earth leakage currents. It protects users from electric shock by rapidly disconnecting power. It also mitigates fire risks caused by insulation faults.

2. What does 1P+N mean on the Siemens 5SU1356-7KK13?

"1P+N" signifies a single-pole plus neutral configuration. This means it switches both the live and neutral conductors simultaneously. It is used for single-phase circuits needing full isolation. This ensures complete disconnection from the power supply.

3. Can I use the Siemens 5SU1356-7KK13 for motor protection?

Yes, its Type C tripping characteristic is suitable for circuits with moderate inrush currents. This includes small motors and inductive loads. It prevents nuisance tripping during start-up.

4. What is the rated short-circuit breaking capacity (Icn) of this RCCB?

The Siemens 5SU1356-7KK13 has a rated short-circuit breaking capacity of 6kA. This indicates its ability to safely interrupt fault currents up to this level. It ensures protection against overcurrents and short circuits.

5. How do I correctly wire the Siemens 5SU1356-7KK13?

Connect the incoming line and neutral to the top terminals. The outgoing load conductors connect to the bottom terminals. Observe correct polarity. The protective earth conductor bypasses the RCCB.

6. What is the significance of the 30mA residual current rating?

A 30mA rating is considered the maximum safe limit for personal protection against electric shock. It ensures rapid disconnection when leakage current reaches dangerous levels. This provides crucial safety for personnel.

7. What is the difference between an RCCB and a Miniature Circuit Breaker (MCB)?

An MCB primarily protects against overcurrents (overloads and short circuits). An RCCB specifically protects against earth leakage currents. This device combines both functions to some extent with its Icn rating.

8. How often should I test the Siemens 5SU1356-7KK13?

Regular testing is crucial for ensuring functionality. Test the device monthly or as per local electrical codes. Use the integrated test button to simulate a fault.

9. What are the operating temperature limits for this Siemens RCCB?

This RCCB operates reliably within a temperature range of -25°C to +45°C. This wide range ensures performance in various environmental conditions. It is suitable for many industrial settings.

10. Is the Siemens 5SU1356-7KK13 compatible with other electrical components?

Yes, it is designed for compatibility with standard DIN rail mounting systems. It integrates well within Siemens' SIVACON and ALPHA distribution boards. This ensures flexibility in system design.